Reliability and validity are related qualities but independent. They are similar to the terms “precision” and “accuracy,” respectively. A wind-up clock that does not work is accurate (valid) twice a day. But it lacks precision (reliability). A digital clock that is always 5 minutes slow is never accurate (valid) but is very precise (reliable). Elaborate on the assessment instrument used in your project to ensure validity and reliability.
Please note that the project am working on is the effect, causes and treatment of TB Kindly use the recommended text book and two other references Textbook

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